/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:01:22,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:01:22,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:01:22,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 23:01:22,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 23:01:22,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 23:01:22,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 23:01:22,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 23:01:22,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 23:01:22,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 23:01:22,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 23:01:22,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 23:01:22,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:01:22,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:01:22,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:01:22,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:01:22,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:01:22,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:01:22,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:01:22,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:01:22,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:01:22,922 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:01:22,923 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:01:22,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:01:22,928 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:01:22,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:01:22,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:01:22,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:01:22,939 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 23:01:22,949 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:01:22,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:01:22,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:01:22,950 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:01:22,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:01:22,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:01:22,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:01:22,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:01:22,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:01:22,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:01:22,952 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:01:22,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:01:22,952 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:01:22,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:01:22,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:01:22,953 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:01:22,953 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:01:22,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:01:22,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:01:22,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:01:22,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:01:22,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:01:22,954 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 23:01:23,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:01:23,264 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:01:23,268 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:01:23,269 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:01:23,270 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:01:23,271 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-08-22 23:01:23,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e97b5b21/9d9f0eaf818b47c9a42281ac6c821b5c/FLAGa0c1e38ae [2020-08-22 23:01:23,837 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:01:23,838 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i [2020-08-22 23:01:23,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e97b5b21/9d9f0eaf818b47c9a42281ac6c821b5c/FLAGa0c1e38ae [2020-08-22 23:01:24,216 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e97b5b21/9d9f0eaf818b47c9a42281ac6c821b5c [2020-08-22 23:01:24,226 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:01:24,228 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:01:24,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:01:24,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:01:24,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:01:24,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:01:24" (1/1) ... [2020-08-22 23:01:24,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fd95791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:24, skipping insertion in model container [2020-08-22 23:01:24,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:01:24" (1/1) ... [2020-08-22 23:01:24,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:01:24,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:01:24,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:01:24,475 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:01:24,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:01:24,515 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:01:24,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:24 WrapperNode [2020-08-22 23:01:24,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:01:24,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:01:24,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:01:24,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:01:24,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:24" (1/1) ... [2020-08-22 23:01:24,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:24" (1/1) ... [2020-08-22 23:01:24,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:24" (1/1) ... [2020-08-22 23:01:24,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:24" (1/1) ... [2020-08-22 23:01:24,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:24" (1/1) ... [2020-08-22 23:01:24,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:24" (1/1) ... [2020-08-22 23:01:24,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:24" (1/1) ... [2020-08-22 23:01:24,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:01:24,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:01:24,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:01:24,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:01:24,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:01:24,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:01:24,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:01:24,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:01:24,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:01:24,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:01:24,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:01:24,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 23:01:24,728 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:01:24,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:01:24,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:01:24,937 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:01:24,937 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 23:01:24,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:01:24 BoogieIcfgContainer [2020-08-22 23:01:24,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:01:24,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:01:24,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:01:24,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:01:24,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:01:24" (1/3) ... [2020-08-22 23:01:24,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@261d7ddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:01:24, skipping insertion in model container [2020-08-22 23:01:24,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:24" (2/3) ... [2020-08-22 23:01:24,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@261d7ddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:01:24, skipping insertion in model container [2020-08-22 23:01:24,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:01:24" (3/3) ... [2020-08-22 23:01:24,952 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-08-22 23:01:24,964 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:01:24,972 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:01:24,988 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:01:25,053 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:01:25,053 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:01:25,053 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:01:25,053 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:01:25,053 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:01:25,056 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:01:25,056 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:01:25,056 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:01:25,077 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-08-22 23:01:25,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 23:01:25,107 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:25,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:25,108 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:25,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:25,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1882057920, now seen corresponding path program 1 times [2020-08-22 23:01:25,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:25,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260585208] [2020-08-22 23:01:25,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:25,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:25,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260585208] [2020-08-22 23:01:25,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:01:25,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 23:01:25,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151188239] [2020-08-22 23:01:25,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 23:01:25,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:25,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 23:01:25,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 23:01:25,294 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-08-22 23:01:25,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:25,324 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-08-22 23:01:25,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 23:01:25,325 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-22 23:01:25,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:25,334 INFO L225 Difference]: With dead ends: 37 [2020-08-22 23:01:25,335 INFO L226 Difference]: Without dead ends: 20 [2020-08-22 23:01:25,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 23:01:25,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-08-22 23:01:25,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-08-22 23:01:25,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-22 23:01:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-22 23:01:25,382 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2020-08-22 23:01:25,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:25,382 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-22 23:01:25,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 23:01:25,383 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-22 23:01:25,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 23:01:25,384 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:25,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:25,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:01:25,384 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:25,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:25,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1869128626, now seen corresponding path program 1 times [2020-08-22 23:01:25,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:25,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010187536] [2020-08-22 23:01:25,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:25,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:25,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010187536] [2020-08-22 23:01:25,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:01:25,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 23:01:25,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229502244] [2020-08-22 23:01:25,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:01:25,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:25,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:01:25,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:01:25,490 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-08-22 23:01:25,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:25,539 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-08-22 23:01:25,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 23:01:25,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 23:01:25,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:25,542 INFO L225 Difference]: With dead ends: 31 [2020-08-22 23:01:25,542 INFO L226 Difference]: Without dead ends: 26 [2020-08-22 23:01:25,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:01:25,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-22 23:01:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-08-22 23:01:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 23:01:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-08-22 23:01:25,552 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2020-08-22 23:01:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:25,553 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-08-22 23:01:25,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:01:25,553 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-08-22 23:01:25,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 23:01:25,554 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:25,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:25,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:01:25,555 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:25,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:25,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1535432394, now seen corresponding path program 1 times [2020-08-22 23:01:25,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:25,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109942608] [2020-08-22 23:01:25,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:25,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:25,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109942608] [2020-08-22 23:01:25,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:25,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 23:01:25,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760371757] [2020-08-22 23:01:25,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 23:01:25,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:25,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 23:01:25,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:01:25,940 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-08-22 23:01:26,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:26,233 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-08-22 23:01:26,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 23:01:26,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-08-22 23:01:26,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:26,235 INFO L225 Difference]: With dead ends: 50 [2020-08-22 23:01:26,235 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 23:01:26,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-08-22 23:01:26,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 23:01:26,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-08-22 23:01:26,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 23:01:26,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 23:01:26,245 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-08-22 23:01:26,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:26,246 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 23:01:26,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 23:01:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 23:01:26,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 23:01:26,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:26,247 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:26,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:01:26,248 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:26,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:26,248 INFO L82 PathProgramCache]: Analyzing trace with hash -927596731, now seen corresponding path program 1 times [2020-08-22 23:01:26,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:26,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285048416] [2020-08-22 23:01:26,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:26,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:26,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285048416] [2020-08-22 23:01:26,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:26,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 23:01:26,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739833440] [2020-08-22 23:01:26,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:01:26,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:26,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:01:26,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:01:26,300 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-08-22 23:01:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:26,351 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-08-22 23:01:26,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:01:26,352 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-08-22 23:01:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:26,353 INFO L225 Difference]: With dead ends: 42 [2020-08-22 23:01:26,353 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 23:01:26,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:01:26,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 23:01:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-08-22 23:01:26,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 23:01:26,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-08-22 23:01:26,362 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-08-22 23:01:26,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:26,362 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-08-22 23:01:26,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:01:26,363 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-08-22 23:01:26,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 23:01:26,363 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:26,364 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:26,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:01:26,364 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:26,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:26,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1778100254, now seen corresponding path program 2 times [2020-08-22 23:01:26,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:26,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870767728] [2020-08-22 23:01:26,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:26,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 23:01:26,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870767728] [2020-08-22 23:01:26,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:26,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 23:01:26,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430243968] [2020-08-22 23:01:26,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 23:01:26,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:26,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 23:01:26,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-22 23:01:26,717 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 13 states. [2020-08-22 23:01:27,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:27,079 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-08-22 23:01:27,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 23:01:27,080 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-08-22 23:01:27,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:27,081 INFO L225 Difference]: With dead ends: 41 [2020-08-22 23:01:27,081 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 23:01:27,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-08-22 23:01:27,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 23:01:27,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-22 23:01:27,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 23:01:27,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-08-22 23:01:27,092 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 26 [2020-08-22 23:01:27,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:27,092 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-08-22 23:01:27,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 23:01:27,093 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-08-22 23:01:27,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 23:01:27,094 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:27,094 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:27,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 23:01:27,095 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:27,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:27,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1884066515, now seen corresponding path program 2 times [2020-08-22 23:01:27,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:27,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560119436] [2020-08-22 23:01:27,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:27,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:27,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560119436] [2020-08-22 23:01:27,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:27,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 23:01:27,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226432251] [2020-08-22 23:01:27,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 23:01:27,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:27,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 23:01:27,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:01:27,180 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 7 states. [2020-08-22 23:01:27,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:27,285 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-08-22 23:01:27,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 23:01:27,286 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-08-22 23:01:27,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:27,287 INFO L225 Difference]: With dead ends: 54 [2020-08-22 23:01:27,287 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 23:01:27,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:01:27,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 23:01:27,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-08-22 23:01:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 23:01:27,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-08-22 23:01:27,306 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 31 [2020-08-22 23:01:27,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:27,307 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-08-22 23:01:27,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 23:01:27,308 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-08-22 23:01:27,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 23:01:27,310 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:27,310 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:27,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 23:01:27,311 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:27,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:27,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1557187861, now seen corresponding path program 3 times [2020-08-22 23:01:27,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:27,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213049191] [2020-08-22 23:01:27,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:27,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:27,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213049191] [2020-08-22 23:01:27,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:27,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 23:01:27,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170432806] [2020-08-22 23:01:27,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 23:01:27,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:27,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 23:01:27,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:01:27,416 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-08-22 23:01:27,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:27,530 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-08-22 23:01:27,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 23:01:27,532 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-22 23:01:27,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:27,533 INFO L225 Difference]: With dead ends: 60 [2020-08-22 23:01:27,534 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 23:01:27,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:01:27,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 23:01:27,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-08-22 23:01:27,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 23:01:27,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-08-22 23:01:27,544 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 37 [2020-08-22 23:01:27,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:27,545 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-08-22 23:01:27,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 23:01:27,545 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-08-22 23:01:27,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 23:01:27,546 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:27,546 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:27,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 23:01:27,547 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:27,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:27,547 INFO L82 PathProgramCache]: Analyzing trace with hash -2133811459, now seen corresponding path program 4 times [2020-08-22 23:01:27,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:27,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051926630] [2020-08-22 23:01:27,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:27,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:27,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051926630] [2020-08-22 23:01:27,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:27,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 23:01:27,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968272285] [2020-08-22 23:01:27,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 23:01:27,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:27,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 23:01:27,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:01:27,650 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2020-08-22 23:01:27,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:27,822 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-08-22 23:01:27,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 23:01:27,823 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-08-22 23:01:27,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:27,825 INFO L225 Difference]: With dead ends: 66 [2020-08-22 23:01:27,825 INFO L226 Difference]: Without dead ends: 55 [2020-08-22 23:01:27,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-08-22 23:01:27,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-22 23:01:27,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-08-22 23:01:27,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 23:01:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-08-22 23:01:27,842 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2020-08-22 23:01:27,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:27,843 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-08-22 23:01:27,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 23:01:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-08-22 23:01:27,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 23:01:27,850 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:27,850 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:27,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 23:01:27,855 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:27,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:27,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1351967461, now seen corresponding path program 5 times [2020-08-22 23:01:27,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:27,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601138514] [2020-08-22 23:01:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:28,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:28,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601138514] [2020-08-22 23:01:28,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:28,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 23:01:28,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684907291] [2020-08-22 23:01:28,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 23:01:28,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:28,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 23:01:28,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-22 23:01:28,035 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 13 states. [2020-08-22 23:01:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:28,228 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-08-22 23:01:28,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 23:01:28,229 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-08-22 23:01:28,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:28,230 INFO L225 Difference]: With dead ends: 72 [2020-08-22 23:01:28,230 INFO L226 Difference]: Without dead ends: 61 [2020-08-22 23:01:28,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-08-22 23:01:28,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-22 23:01:28,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-08-22 23:01:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-22 23:01:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-08-22 23:01:28,253 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-08-22 23:01:28,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:28,254 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-08-22 23:01:28,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 23:01:28,254 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-08-22 23:01:28,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 23:01:28,255 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:28,256 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:28,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 23:01:28,257 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:28,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:28,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1927178035, now seen corresponding path program 6 times [2020-08-22 23:01:28,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:28,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043202038] [2020-08-22 23:01:28,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:28,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:28,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043202038] [2020-08-22 23:01:28,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:28,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 23:01:28,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45582200] [2020-08-22 23:01:28,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 23:01:28,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:28,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 23:01:28,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:01:28,478 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 15 states. [2020-08-22 23:01:28,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:28,682 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-08-22 23:01:28,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 23:01:28,683 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-08-22 23:01:28,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:28,684 INFO L225 Difference]: With dead ends: 78 [2020-08-22 23:01:28,684 INFO L226 Difference]: Without dead ends: 67 [2020-08-22 23:01:28,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-08-22 23:01:28,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-22 23:01:28,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-08-22 23:01:28,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 23:01:28,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-08-22 23:01:28,711 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2020-08-22 23:01:28,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:28,711 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-08-22 23:01:28,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 23:01:28,712 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-08-22 23:01:28,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 23:01:28,712 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:28,713 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:28,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 23:01:28,713 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:28,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:28,714 INFO L82 PathProgramCache]: Analyzing trace with hash -879247179, now seen corresponding path program 7 times [2020-08-22 23:01:28,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:28,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922597753] [2020-08-22 23:01:28,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:28,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 29 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:28,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922597753] [2020-08-22 23:01:28,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:28,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 23:01:28,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479344047] [2020-08-22 23:01:28,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 23:01:28,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:28,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 23:01:28,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-08-22 23:01:28,915 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2020-08-22 23:01:29,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:29,202 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-08-22 23:01:29,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 23:01:29,202 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-08-22 23:01:29,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:29,203 INFO L225 Difference]: With dead ends: 84 [2020-08-22 23:01:29,203 INFO L226 Difference]: Without dead ends: 73 [2020-08-22 23:01:29,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-08-22 23:01:29,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-22 23:01:29,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-08-22 23:01:29,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 23:01:29,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-08-22 23:01:29,216 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2020-08-22 23:01:29,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:29,217 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-08-22 23:01:29,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 23:01:29,217 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-08-22 23:01:29,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 23:01:29,218 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:29,218 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:29,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 23:01:29,218 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:29,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:29,219 INFO L82 PathProgramCache]: Analyzing trace with hash -583378275, now seen corresponding path program 8 times [2020-08-22 23:01:29,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:29,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119575906] [2020-08-22 23:01:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:29,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 33 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:29,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119575906] [2020-08-22 23:01:29,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:29,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 23:01:29,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33265073] [2020-08-22 23:01:29,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 23:01:29,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:29,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 23:01:29,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-08-22 23:01:29,405 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 19 states. [2020-08-22 23:01:29,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:29,772 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-08-22 23:01:29,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 23:01:29,772 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2020-08-22 23:01:29,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:29,774 INFO L225 Difference]: With dead ends: 89 [2020-08-22 23:01:29,774 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 23:01:29,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 23:01:29,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 23:01:29,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-22 23:01:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 23:01:29,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-08-22 23:01:29,801 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-08-22 23:01:29,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:29,801 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-08-22 23:01:29,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 23:01:29,802 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-08-22 23:01:29,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 23:01:29,805 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:29,806 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:29,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 23:01:29,806 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:29,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:29,807 INFO L82 PathProgramCache]: Analyzing trace with hash 929818245, now seen corresponding path program 9 times [2020-08-22 23:01:29,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:29,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327274800] [2020-08-22 23:01:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 23:01:29,836 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 23:01:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 23:01:29,873 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 23:01:29,903 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 23:01:29,904 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 23:01:29,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 23:01:29,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:01:29 BoogieIcfgContainer [2020-08-22 23:01:29,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:01:29,990 INFO L168 Benchmark]: Toolchain (without parser) took 5757.00 ms. Allocated memory was 138.4 MB in the beginning and 279.4 MB in the end (delta: 141.0 MB). Free memory was 103.0 MB in the beginning and 143.4 MB in the end (delta: -40.4 MB). Peak memory consumption was 100.7 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:29,996 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 23:01:29,998 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.63 ms. Allocated memory is still 138.4 MB. Free memory was 102.8 MB in the beginning and 93.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:29,999 INFO L168 Benchmark]: Boogie Preprocessor took 121.95 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 93.4 MB in the beginning and 181.9 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:30,000 INFO L168 Benchmark]: RCFGBuilder took 302.34 ms. Allocated memory is still 201.9 MB. Free memory was 181.9 MB in the beginning and 169.0 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:30,007 INFO L168 Benchmark]: TraceAbstraction took 5039.80 ms. Allocated memory was 201.9 MB in the beginning and 279.4 MB in the end (delta: 77.6 MB). Free memory was 168.3 MB in the beginning and 143.4 MB in the end (delta: 24.9 MB). Peak memory consumption was 102.5 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:30,012 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 287.63 ms. Allocated memory is still 138.4 MB. Free memory was 102.8 MB in the beginning and 93.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.95 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 93.4 MB in the beginning and 181.9 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 302.34 ms. Allocated memory is still 201.9 MB. Free memory was 181.9 MB in the beginning and 169.0 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5039.80 ms. Allocated memory was 201.9 MB in the beginning and 279.4 MB in the end (delta: 77.6 MB). Free memory was 168.3 MB in the beginning and 143.4 MB in the end (delta: 24.9 MB). Peak memory consumption was 102.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; VAL [__VERIFIER_nondet_uint()=10, n=10] [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; VAL [n=0, n=10] [L13] i=1 VAL [i=1, n=10, n=0] [L13] COND TRUE i<=n VAL [i=1, n=10, n=0] [L14] COND TRUE i<10 VAL [i=1, n=0, n=10] [L15] sn = sn + (2) VAL [i=1, n=10, n=2] [L13] i++ VAL [i=2, n=2, n=10] [L13] COND TRUE i<=n VAL [i=2, n=2, n=10] [L14] COND TRUE i<10 VAL [i=2, n=10, n=2] [L15] sn = sn + (2) VAL [i=2, n=10, n=4] [L13] i++ VAL [i=3, n=10, n=4] [L13] COND TRUE i<=n VAL [i=3, n=10, n=4] [L14] COND TRUE i<10 VAL [i=3, n=10, n=4] [L15] sn = sn + (2) VAL [i=3, n=6, n=10] [L13] i++ VAL [i=4, n=10, n=6] [L13] COND TRUE i<=n VAL [i=4, n=6, n=10] [L14] COND TRUE i<10 VAL [i=4, n=10, n=6] [L15] sn = sn + (2) VAL [i=4, n=8, n=10] [L13] i++ VAL [i=5, n=8, n=10] [L13] COND TRUE i<=n VAL [i=5, n=10, n=8] [L14] COND TRUE i<10 VAL [i=5, n=8, n=10] [L15] sn = sn + (2) VAL [i=5, n=10, n=10] [L13] i++ VAL [i=6, n=10, n=10] [L13] COND TRUE i<=n VAL [i=6, n=10, n=10] [L14] COND TRUE i<10 VAL [i=6, n=10, n=10] [L15] sn = sn + (2) VAL [i=6, n=10, n=12] [L13] i++ VAL [i=7, n=12, n=10] [L13] COND TRUE i<=n VAL [i=7, n=10, n=12] [L14] COND TRUE i<10 VAL [i=7, n=12, n=10] [L15] sn = sn + (2) VAL [i=7, n=14, n=10] [L13] i++ VAL [i=8, n=14, n=10] [L13] COND TRUE i<=n VAL [i=8, n=14, n=10] [L14] COND TRUE i<10 VAL [i=8, n=10, n=14] [L15] sn = sn + (2) VAL [i=8, n=16, n=10] [L13] i++ VAL [i=9, n=10, n=16] [L13] COND TRUE i<=n VAL [i=9, n=16, n=10] [L14] COND TRUE i<10 VAL [i=9, n=16, n=10] [L15] sn = sn + (2) VAL [i=9, n=18, n=10] [L13] i++ VAL [i=10, n=18, n=10] [L13] COND TRUE i<=n VAL [i=10, n=18, n=10] [L14] COND FALSE !(i<10) VAL [i=10, n=18, n=10] [L13] i++ VAL [i=11, n=10, n=18] [L13] COND FALSE !(i<=n) VAL [i=11, n=10, n=18] [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.8s, OverallIterations: 13, TraceHistogramMax: 10, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 209 SDtfs, 176 SDslu, 1151 SDs, 0 SdLazy, 707 SolverSat, 69 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 239 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 30 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 515 NumberOfCodeBlocks, 515 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 430 ConstructedInterpolants, 0 QuantifiedInterpolants, 51244 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 153/737 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...